This is a topographic map which is easily recognized by its detail and representation of relief using contour lines. A topographic map is a detailed and accurate representation of features on the ground. The contour lines represent the interaction of the surface with the horizontal planes, allowing the reader to distinguish gradient.
http://vulcan.wr.usgs.gov/Volcanoes/CraterLake/Maps/map_crater_lake_topo.html
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